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Q. No.The scientist related with the theory of biogenesis and experiments with swan-necked flasks is
1. Von Helmont
2. Louis Pasteur
3. Miller
4. Haeckel
Subtopic: Other Theories of Origin of Life |
74%
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All of the following conditions were present on early earth, except
1. High temperature
2. Volcanic storms
3. Oxidising atmosphere
4. Reducing atmosphere
1. High temperature
2. Volcanic storms
3. Oxidising atmosphere
4. Reducing atmosphere
Subtopic: Examples of Chemical Evolution | Origin of Life |
90%
From NCERT
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Which of the following brokeup water into hydrogen and oxygen on early earth?
1. Visible light
2. Infrared radiations
3. Sunlight
4. UV radiations
1. Visible light
2. Infrared radiations
3. Sunlight
4. UV radiations
Subtopic: Origin of Life |
83%
From NCERT
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One of the following appeared on earth with the origin of plants and was absent in the primitive atmosphere.
Select the correct option
1. Carbon dioxide
2. Methane
3. Ammonia
4. Oxygen
Select the correct option
1. Carbon dioxide
2. Methane
3. Ammonia
4. Oxygen
Subtopic: Cosmic Evolution | Examples of Chemical Evolution | Origin of Life |
85%
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Theory of abiogenesis or spontaneous generation was first disapproved by
1. Electric discharge experiment
2. Microsphere formation in spark chamber
3. Lederberg replica plate experiment
4. Curved neck experiment
1. Electric discharge experiment
2. Microsphere formation in spark chamber
3. Lederberg replica plate experiment
4. Curved neck experiment
Subtopic: Other Theories of Origin of Life |
67%
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Simple one-celled cyanobacteria like organisms appeared on earth
1. 5600 million years ago
2. 5000 million years ago
3. 4600 million years ago
4. 3.3 to 3.5 billion years ago
1. 5600 million years ago
2. 5000 million years ago
3. 4600 million years ago
4. 3.3 to 3.5 billion years ago
Subtopic: A BRIEF ACCOUNT OF EVOLUTION |
68%
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Eukaryotes developed around
1. 1,600 million years ago
2. 459 million years ago
3. 3,800 million years ago
4. 4,200 million years ago
1. 1,600 million years ago
2. 459 million years ago
3. 3,800 million years ago
4. 4,200 million years ago
Subtopic: A BRIEF ACCOUNT OF EVOLUTION |
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The atmosphere became oxidising with the appearance of earliest
1. Autotrophic bacteria
2. Autotrophic cyanobacteria
3. Land plants
4. Algae
1. Autotrophic bacteria
2. Autotrophic cyanobacteria
3. Land plants
4. Algae
Subtopic: Origin of Life |
70%
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Which one of the following gas was not present in free form at the time life originated on earth?
1. Ammonia
2. Oxygen
3. Hydrogen
4. Methane
1. Ammonia
2. Oxygen
3. Hydrogen
4. Methane
Subtopic: Cosmic Evolution | Origin of Life |
94%
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The theory of spontaneous generation says that
1. Life originated from the decaying and rotting matter like straw, mud etc
2. Life came on the earth from outerspace
3. Life comes from pre-existing life only
4. Life started with the replication of self replicating metabolic capsules
1. Life originated from the decaying and rotting matter like straw, mud etc
2. Life came on the earth from outerspace
3. Life comes from pre-existing life only
4. Life started with the replication of self replicating metabolic capsules
Subtopic: Other Theories of Origin of Life | Origin of Life |
82%
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